Re: [PATCH v4 03/38] iommu: add generic helper for mapping sgtable objects

From
Joerg Roedel <joro@8bytes.org>
Date
2020-05-13 09:03:24
Also in
dri-devel, linux-iommu, lkml
Reply to
Marek Szyprowski, 2020-05-12
Hi Marek,

On Tue, May 12, 2020 at 11:00:23AM +0200, Marek Szyprowski wrote:
quoted hunk ↗ jump to hunk
---
 include/linux/iommu.h | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
Some nits below, with those fixed:

	Acked-by: Joerg Roedel [off-list ref]
quoted hunk ↗ jump to hunk
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 7cfd2dd..ba662ba 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -478,6 +478,22 @@ extern size_t iommu_map_sg_atomic(struct iommu_domain *domain,
 extern void iommu_set_fault_handler(struct iommu_domain *domain,
 			iommu_fault_handler_t handler, void *token);
 
+/**
+ * iommu_map_sgtable - Map the given buffer to the IOMMU domain
+ * @domain:	The IOMMU domain to perfor
                                    ^^^^^^ Truncated comment?
+ * @iova:	The start addrees to map the buffer
                          ^^^^^^^ Typo
+ * @sgt:	The sg_table object describing the buffer
+ * @prot:	IOMMU protection bits
+ *
+ * Create a mapping at @iova for the buffer described by a scatterlist
+ * stored in the given sg_table object in the provided IOMMU domain.
+ */
+static inline size_t iommu_map_sgtable(struct iommu_domain *domain,
+			unsigned long iova, struct sg_table *sgt, int prot)
+{
+	return iommu_map_sg(domain, iova, sgt->sgl, sgt->orig_nents, prot);
+}
+
 extern void iommu_get_resv_regions(struct device *dev, struct list_head *list);
 extern void iommu_put_resv_regions(struct device *dev, struct list_head *list);
 extern void generic_iommu_put_resv_regions(struct device *dev,
-- 
1.9.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
Thread (53 messages) 53 messages, 5 authors, last reply 2020-05-13
Keyboard shortcuts
hback out one level
jnext message in thread / next series-diff position
kprevious message in thread / previous series-diff position
ldrill in
Escclose help / fold thread tree
?toggle this help